Human body systems

The study of human body systems looks at how different organs and tissues work together keep us healthy. Understanding these systems helps us see how the body functions and how different parts support life. Use this resource to learn how systems like the circulatory, respiratory, and digestive systems work together to keep the body running smoothly.

Overview

• Digestive system – how does the digestive system help extract nutrients from the food we eat?
• Central nervous system – how do the brain and spinal cord coordinate responses?
• Peripheral nervous system – how do the neurones in the body work with the central nervous system to mount responses?
• Skeletal system – what structures provide the body with shape and protection?
• Muscular system – what structures help the body move?
• Respiratory system – how do we obtain the oxygen we need to survive?
• Circulatory system – how does the body deliver oxygen and nutrients to the cells?
• Endocrine system – how do hormones work?
• Excretory system – how do we get rid of waste from the body?
• Homeostasis – how does the body maintain a stable internal environment?